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参数资料
| 型号： | DS1258Y-70-IND |
| 英文描述： | Safety Sign; Legend:Notice Authorized Personnel Only; External Height:7"; External Width:10"; Body Material:Polyester; Color:Blue/Black RoHS Compliant: NA |
| 中文描述： | 128K的× 16非易失SRAM |
| 文件页数： | 2/8页 |
| 文件大小： | 174K |
| 代理商： | DS1258Y-70-IND |
DS1258Y/AB
2 of 8
READ MODE
The DS1258 devices execute a read cycle whenever
WE
(Write Enable) is inactive (high) and either/both
of
CEU
or
CEL
(Chip Enables) are active (low) and
OE
(Output Enable) is active (low). The unique
address specified by the 17 address inputs (A0-A16) defines which of the 131,072 words of data is
accessed. The status of
CEU
and
CEL
determines whether all or part of the addressed word is accessed. If
CEU
is active with
CEL
inactive, then only the upper byte of the addressed word is accessed. If
CEU
is
inactive with
CEL
active, then only the lower byte of the addressed word is accessed. If both the
CEU
and
CEL
inputs are active (low), then the entire 16-bit word is accessed. Valid data will be available to
the 16 data output drivers within t
ACC
(Access Time) after the last address input signal is stable, providing
that
CEU
,
CEL
and
OE
access times are also satisfied. If
CEU
,
CEL
, and
OE
access times are not
satisfied, then data access must be measured from the later occurring signal, and the limiting parameter is
either t
CO
for
CEU
,
CEL
, or t
OE
for
OE
rather than address access.
WRITE MODE
The DS1258 devices execute a write cycle whenever
WE
and either/both of
CEU
or
CEL
are active (low)
after address inputs are stable. The unique address specified by the 17 address inputs (A0-A16) defines
which of the 131,072 words of data is accessed. The status of
CEU
and
CEL
determines whether all or
part of the addressed word is accessed. If
CEU
is active with
CEL
inactive, then only the upper byte of
the addressed word is accessed. If
CEU
is inactive with
CEL
active, then only the lower byte of the
addressed word is accessed. If both the
CEU
and
CEL
inputs are active (low), then the entire 16-bit word
is accessed. The write cycle is terminated by the earlier rising edge of
CEU
and/or
CEL
, or
WE
. All
address inputs must be kept valid throughout the write cycle.
WE
must return to the high state for a
minimum recovery time (t
WR
) before another cycle can be initiated. The
OE
control signal should be kept
inactive (high) during write cycles to avoid bus contention. However, if the output drivers are enabled
(
CEU
and/or
CEL
, and
OE
active) then
WE
will disable the outputs in t
ODW
from its falling edge.
READ/WRITE FUNCTION
Table 1
V
CC
CURRENT
H
H
X
X
I
CCO
L
H
L
L
L
H
L
H
L
H
H
L
X
L
L
L
X
L
L
H
X
L
H
L
X
X
H
H
I
CCS
DATA RETENTION MODE
The DS1258AB provides full functional capability for V
CC
greater than 4.75V, and write protects by
4.5V. The DS1258Y provides full functional capability for V
CC
greater than 4.5V and write protects by
4.25V. Data is maintained in the absence of V
CC
without any additional support circuitry. The NV static
RAMs constantly monitor V
CC
. Should the supply voltage decay, the NV SRAMs automatically write
protect themselves, all inputs become “don’t care,” and all outputs become high impedance. As V
CC
falls
below approximately 3.0V, a power switching circuit connects the lithium energy source to RAM to
OE
WE
CEL
CEU
DQ0-DQ7
High-Z
Output
Output
High-Z
Input
Input
High-Z
High-Z
DQ8-DQ15
High-Z
Output
High-Z
Output
Input
High-Z
Input
High-Z
CYCLE
PERFORMED
Output Disabled
I
CCO
Read Cycle
I
CCO
Write Cycle
Output Disabled
相关PDF资料 |
PDF描述 |
|---|---|
| DS1258W-100 | 3.3V 128k x 16 Nonvolatile |
| DS1258W-150 | 3.3V 128k x 16 Nonvolatile |
| DS1258WP-100 | 3.3V 128k x 16 Nonvolatile |
| DS1258WP-150 | CONNECTOR ACCESSORY |
| DS1258Y-100 | 128k x 16 Nonvolatile SRAM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1258Y-70IND# | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
| DS1259 | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS1259+ | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS1259N | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS1259S | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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